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unusual facts about Diversity index


Diversity index

The Simpson index was introduced in 1949 by Edward H. Simpson to measure the degree of concentration when individuals are classified into types.


Jaccard index

The Jaccard index, also known as the Jaccard similarity coefficient (originally coined coefficient de communauté by Paul Jaccard), is a statistic used for comparing the similarity and diversity of sample sets.


see also

Prometheus Radio Project

They ruled that a "diversity index" used by the FCC to weigh cross-ownership (of radio, television and newspapers) employed several "irrational assumptions and inconsistencies." Dissent by Chief Judge Anthony Joseph Scirica noted that the majority were simply employing their own assumptions.